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Finding the Fourth Proportional to 386,544.67, 579,871.70 and 120,332.09

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Solution

The fourth proportional to 386,544.67, 579,871.70 and 120,332.09 is: 180,515.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,544.67 : 579,871.70 = 120,332.09 : x
  2. Step 2: Convert to fraction form
    386,544.67/579,871.70 = 120,332.09/x
  3. Step 3: Cross multiply
    386,544.67x = 579,871.70 × 120,332.09
  4. Step 4: Simplify right side
    386,544.67x = 69,777,173,592.85
  5. Step 5: Solve for x
    x = 69,777,173,592.85/386,544.67
  6. Step 6: Final answer
    x = 180,515.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.